coffee fix the new research reveal was it could be doing to your >>> good morning. arctic plunge in the northern high plains and minneapolis. 40s for highs today this arctic air making its way as far south as st. louis, high of 53 today. 84 in dallas tomorrow will be replaced with 50° temperatures. very cold air coming into the nation's mid section. still looking at mild air in the east no airport delays so far eastern seaboard, back home, low clouds and fog not causing much of a problem three mile visibility around half moon bay >> 4:49. successful debate performance under his belt, mitt romney is distancing him from his words about the 47%. in the past he stood by the comments. overnight, major change. tahman bradley has the latest. >> reporter: with his campaign reenergized after a strong showing in wednesday's debate mitt romney took on the controversy surrounding his comments that 47% of americans are dependent on government. shortly after a tape of his s -- of his comments were released he said his s were not eloquently stated. >> completely wrong. i absolute